I can't help you with the value of the account, but I just broke my zerker today.
I don't have friends that really like to pk a ton, and even if I do pk I go deep so combat isn't a huge deal. I like bossing a lot more for fun and money and that involves having defense (for the most part).
If I want to pk I'll make a 1 def pure.
So for you, if you really like pking at edge then don't break it. However, if you really enjoy bossing and don't have a main then either make a main or have this be your main.